Pilch, Meir2011-06-282011-06-281952-08https://hdl.handle.net/11299/108180This report is a translation of a series of five Dutch articles by J. P. Josephus Jitta, Chief Engineer of the Netherlands Waterways Department.This compilation comprises five articles dealing with the design and operating characteristics of both actual and hypothetical navigation locks. The first article, the major work of this series, is a thorough analytical and experimental study of filling and emptying systems for locks, undertaken with the objective of determining the optimum design of a proposed lock. The second paper presents a detailed description of the design aspects and operation features of one of the large locks of the Amsterdam-Rhein Canal. The third article deals with the general design aspect$ and operation details of a large lock. The fourth article constitutes a brief historical survey of filling and emptying systems, with special emphasis on adaptation to high-lift locks. The final article analyzes general and specific aspects of segment and sector valves and gates for lock chambers and culverts.en-USReport